Author Topic: number of loops versus current?  (Read 1042 times)

0 Members and 1 Guest are viewing this topic.

Offline vipulan12Topic starter

  • Robot Overlord
  • ****
  • Posts: 181
  • Helpful? 0
number of loops versus current?
« on: July 06, 2013, 01:54:24 PM »
for an electromagnet the number of loops and the amount of current are huge factors in the strength of it's magnet field but if one was to increase the number of loops wouldn't that require more wire and in turn increase the resistance, if that were the case wouldn't this backfire the whole purpose of looping the electromagnet
-i think it might be a trade off,right but their is more gain than loss,am i right?

Offline jwatte

  • Supreme Robot
  • *****
  • Posts: 1,345
  • Helpful? 82
Re: number of loops versus current?
« Reply #1 on: July 07, 2013, 10:49:07 AM »
Yes, there is a trade-off. To get the same current out of higher resistance, you need higher voltage. Also, as you increase the resistance, keeping the current constant, you will develop more heat. This puts a practical limit to how small or how strong you can make particular electromagnets. There's also the issue of core saturation (maximum flux) to deal with. Different ferrites have different saturation points.

There are text books that talk about this in great detail. If you want to design electromagnets, I highly recommend getting one and reading it! This subject has been studied in great detail for anything from inductors, to transformers, to loudspeakers, to motors, to solenoids.


Get Your Ad Here